Question about "input" parameters for tracking -- e.g., s_src and s_subsrc

Hello,

I have a quick question with which I was hoping to get some help.

I am aware of the two URL parameters, s_src and s_subscr that Convio uses to track and pass source information, say from inbound links, into deeper portions of the Convio site for example where conversions take place (donations, actions, etc).

I was wondering if there are any other such URL parameters that "stick" throughout the Convio site, flow into the Convio reports, and therefore should be considered or could be used?

Specifically I remember someone mentioning something about an s_media parameter, possibly one or two others?  I might not be remembering correctly.

That said I was wondering if we could get a more definitive and complete list of which parameters we can use to pass in values and "stick" throughout their site and go into reports.

Thanks so much!

Regards,

-Matt